Impeovement in- weenohes



(fg: @giuristi tette getmt fitte.

BENJAMIN S. LAWSON, OF BROOKLYN, E. D., NEW YORK.

Letters Patent No. 70,005, elated October 22, 1867; antedated October19, 1867.

IMPROVEMENT IN WRBNGHES.

ALL WHOM IT MAY CONCERN:

Be it known that I, BENJAMIN S. LAWSON, of Brooklyn, E. D., in thecounty of Kings, and State of New York, have invented a'new and improvedWrench and I do hereby declare that the following is a full, clear, andexact description thereof, which will enable others skilled in the artto make and use the same, reference being had `to theaccoinpanyingdrawings, forming part of this specification.

This invention relates to a wrench which is of very simple constructionand of great strength, and which can be easily adjusted to work ofdiFferent kinds..

The invention consists in having a. wedge-shaped stem for the stationaryjaw, said stem being slotted. The movable jaw is provided with a screw,which is passed lthrough the said-slot, and by means of a nut themovable jaw is held ilrplace. The stem of the wrench being narrower atthe top, and gradually gettingl wider towards the handle, prevents themovable jaw from slipping` down on the stem. In the accompanying drawingmy invention 4is illustratedi Figure 1 being a side view, partly insection, of my improved wrench.

Figure 2 being a horizontal sectional view of the same, the plane ofsection being indicated by the line :l: x, lig. 1. i

Similarletters of reference indicate like parts.

A is the handle of the wrench, the upper part, a, of which iswedge-shaped, as shown, being wider at the bottom than'at the top. Thejaw b is rmly secured to A in any desirable manner. The wedge-shapedpart a is provided with a slot, c, as shown, through which a screw,`d,passes, so that the movable jaw c may be secured in place by means ofthe nutf. That portion of the screw d which is in the slot c, or aportion ofthe same, is made square, so as to prevent the jaw e fromturning. On account of the tapering form ofthe Stern a, the movable jawcannot slip down unless the nut is partly unserewed, but it can heeasily moved up when desired. It will be seen that this wrench is ofvery simple construction, and has the advantage of great simplicity andstrength over all the wrenches now made.

claim as new, and desircito secure by Letters Patent- The slottedtapering` wedge A, in combination witl the movable jaw e, screw d, andnut f,.all made and operating substantially as herein shown anddescribed.

BENJAMIN S. LAWSON.

Witnesses:

WM. F. MCNAMARA, ALEX. F. RoBERTs.

